export default {
	namespaced :true,
	
	state: () => ({
		cart:JSON.parse(uni.getStorageSync('cart') || '[]'),
		
	}),
	
	mutations:{
		addToCart(state,goods) {
			const findResult = state.cart.find((x) => x.goods_id === goods.goods_id)
			
			if (!findResult) {
				//判断没有添加
				state.cart.push(goods)
			}else {
				//判断有更新数量
				findResult.goods_count++
			}
			this.commit('m_cart/saveToStorage')
		},
		saveToStorage(state) {
			uni.setStorageSync('cart',JSON.stringify(state.cart))
		},
		updateGoodsState(state,goods) {
			const findResult = state.cart.find(x => x.goods_id === goods.goods_id)
		    if (findResult) {
				findResult.goods_state = goods.goods_state
				this.commit('m_cart/saveToStorage')
			}
		},
		updateGoodsCount(state,goods) {
			const findResult = state.cart.find(x => x.goods_id === goods.goods_id)
			if (findResult) {
				findResult.goods_count = goods.goods_count
				this.commit('m_cart/saveToStorage')
			}
		},
		removeGoodsById(state,goods_id) {
			state.cart = state.cart.filter(x => x.goods_id !== goods_id)
			this.commit('m_cart/saveToStorage')
		},
		updateAllGoodsState(state,newState) {
			state.cart.forEach(x => x.goods_state = newState)
			this.commit('m_cart/saveToStorage')
		}
	},
	
	getters:{
		total(state) {
			let c = 0
			state.cart.forEach(goods => c += goods.goods_count)
			return c
		},
		checkedCount(state) {
			return state.cart.filter(x => x.goods_state).reduce((total,item) => total += item.goods_count,0)
		},
		checkedGoodsAmount(state) {
			return state.cart.filter(x => x.goods_state)
			.reduce((total,item) => total += item.goods_count * item.goods_price,0)
			.toFixed(2)
		}
	},
	

}